WASHINGTON (WYMT/AP) - President Barack Obama said Tuesday carbon pollution limits need to be set on U.S. power plants in order to curb global warming.

Obama said rules are already in place to limit pollution from arsenic, mercury, lead and other substances, but no federal limits exist on how much carbon pollution that power plants - including many that are fired by coal - can dump into the air.

Obama said "that's not right, it's not fair, and it needs to stop."

Obama made his remarks Tuesday in a speech at Georgetown University, where he announced measures he intends to take to limit pollution that is trapping gases in the atmosphere.

Sen. Rand Paul, R-Ky., said, "Climates change over epochs...hundreds of thousands, if not hundreds of millions of years. "So we've had various warming and cooling cycles in our nation's history."

"I think if you were to look at a hundred years out of a 4.5 billion year-old planet, it's really difficult to know if we're warming or cooling."

Sen. Mitch McConnell, R-Ky., said the plan was latest attack in the president's "war on coal."

Rep. Hal Rogers, R-Ky., released the following statement:

"President Obama's disastrous climate change plan is the latest job-killing bomb to be dropped on Kentucky and dozens of other coal states already knocked down after four years of anti-coal policies. This War on Coal is a war on middle-class Americans - it's a war on jobs and it has already put 5,700 Kentucky coal miners out of work since 2011. And to think a White House adviser had the audacity to say, 'we need a war on coal.; In 2008, the President promised to bankrupt the coalfields and today he took another step toward his reckless, shameful goal."

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